RUNNING TIME: - Head design with four cutting edges and optimised cemented carbide geometry ensures excellent working results even in reinforced concrete - Special heat treatment increases the wear resistance of the drill core - Increased flexibility improves fracture resistance ACCURACY: - Thanks to QUATTRO head perfect Cylindrical holes are created (required for installing mechanical anchors). COMFORT: - The 4-blade head and the special heat treatment reduce the effect of vibrations to a minimum.